Adjustment for proportioning machines



P. W. YETT ADJUSTMENT FOR PROPORTIONING- MACHINES s sheets-sheet 1 FiledJan.

unlll In l l Il Dec. l, 1931. P, W, YET-|- ADJUSTMENT FOR PRoPoRTIoNINGMACHINES Filed Jan'. 2l, 1950 3 Sheets-Sheet 2 P W. YETT ./q #TUR /v/ 1,1931- P. w. YETT ADJUSTMENT FOR PROPORTIONING MACHINES` 5 Sheets-Sheet 3Filed Jan.

PN. YETT /4 TTDRNE/ Patented Dec. 1, 1931 rr stares PORTER W. YETT, OFPORTLAND, OREGON ADJUSTMENT Fon rRoPoR'rIoNrNG MACHINES Applicationtiled January 21, 1930.r Serial No. 422,259.

This invention relates generally to vthe making of concrete, andparticularly to an adjustment for the outlet of a proportioning machinefor assembling the aggregates.

The main object of this invention is to 'provide' an adjustment rortheoutlet of a proportioning machine intended to'be used 'for chargingportable lconcrete mixers in which the outlet is capable of lateral,longitudinal and vertical adjustment with rela'- tion to the horizontalaxis of the mixing cylinder.

The second Objectis to make the proportioning machine readily adaptableto use with various heights of mixing cylinders, that is, the height ofthe axis above the ground, such variations being caused by differentkinds of vehicles used for transporting the mixer, and also for varyingdiameters of mixing cylinders,which variations are caused by capacityrequirements.

The third object is to provide-a novel form of charging spout especiallyadapted for the charging of mixing cylinders.

These, and other objects, will become more apparent from the specicationfollowing as illustrated in the accompanying drawings, in which:

Figure 1 is a vertical section through the device.

Figure 2 is a perspective View of the slidaf ble chute element.

Figure 3 is a perspective view of the tiltable chute element.

Figure 4 is a side elevation of the device showing certain of thesupporting elements broken away in section.

Figure 5 is a section taken along the line 5-5 in Figure 1.

Figure 6 is a section taken along the line 6 6 in Figure 1.

Figure 7 is a plan.

Figure 8 is a section taken along the line 8-8 in Figure 4.

Figure 9 is a perspective view of the hopper outlet.

Similar numbers of reference refer to similar parts throughout theseveral views.

Attention is drawn to my copending application, Serial Number 364,654for a portable proportioning machine, over which this device is animprovement.'

Reierring'in detail to the drawings, there is shown an` outer frame 10preferably constructed of I beams and supportedin anyV convenientmanner, either on a wheeled support or on stationary foundations. Withinthe frame 10 is al frame 11 of rectangular shape having on oppositesides thereof the wheels 12 which employ the I beams of the and also anintermediate compartment 21l within which is placed a sliding gate 22provided with a rack 23 which meshes with a pinion 24 on the shaft 25,on whose outer end is secured a chain wheel 26around which passes thechain 27, a manual movementy of which causes the gate 22 to varyL thesizeof the outlet of the compartment 20 in which is stored the cement. Y

The compartment 19 contains the sand and has at the lower end thereof ahinged gate 23` which is operated by a cable 29 for the purpose ofregulating thesand to secure the desired flow, regardless of itsmoisture content. Lateral movement is supplied to the hopper 15 by meansof the hand wheel 30 on the shaft 31 which carries the drum 32 aroundwhich is wound the cable 33 whose opposite ends pass around the pulleys34 and fastened, to the hopper 15. In other words, a'movement of thewheelv30to the `rightor left causes the hopper' 15 to movecorrespondingly.

The hopper 15 convergesk downwardly to form an inclined curved spout 35on-each side of which is mounted an inclined angle bar 36 both of whichare supported from the hopper 15 and are `parallel to each other formingaguide for the slidable chute 'element 37` on the sides of which aresecured the angle'bars 38 provided with-a-series-of perforations 39. Theguides 36 are provided With perforations 40 thro-ugh which is passed aholding pin 41 which also passes through one of the holes 39, therebylocking the slidable chute 37 against a sliding movement. On the underside of the slidable chute 37 is secured a rack 42 which meshes with apinion 43 on the shaft 44 which is operatedy by a crank 45, the rotationof which will cause the chute 37 to slide longitudinally.

Across the spout 35 is hinged the curved gate 46 on the shaft 47 whichis operated.

by the hand lever 48. The bottom edge 49 of the gate 46 need not come inContact with the bottom of the spout 35 in order to completely closesame against'the flow of gravel from the compartment 17.

The tiltingV spout section consists of a curved rearmost portion 50which merges into a somewhat smaller' foremost portion 51 and isintegral therewith. The tilting spout section is provided with thebosses 52 through whose openings 53 pass the bolts 54 which alsorpassthrough thev openings 55 on the sliding spout section 3.7. TheY bolts 54form the hinge connection for the tilting spout section. A hand lever 56is attached to the tilting spout section at itsrearmost portion 50 bymeans of which its inclination can be varied to suitv requirements.v

There is also indicated the charging inlet 57 of a portable concretemixer, and in dotted lines the position of' a similar charging inlet 58of less height than the inlet 57, due either to a smaller capacit.7 orlower mounting for the mixer, and it is for the purpose of adapting thecharger to varying heights of charging inlets 57 and 58 that this devicehas been constructed.

f Briefly reviewing the foregoing structure it will be seen to provide acharging hopper in which the outlet therefor can be inserted into thecharging inlet of a mixer, and for the purpose of facilitating suchinsertion the outlet has been made movably longitudinal with the mixer,as well as laterally with relation thereto and vertically with relationthereto. The vertical adjustment is secured to either or both by asliding aswell as a swinging movement. c

i The operation of the device is as follows: Assuming that a charge ofaggregates occumerely move it out of the way without injuring same. Thesame result could of course be accomplished by means of a spring.

The spout 51 is then steered into the inlet opening 57 under the controlof the lever 48, after which it is moved further into the inlet openingby the crank 45. The various ingredients from the compartments 17, 19and 2O are then allowed to iow through the hopper outlet, under thecomplete control of the operator.

lThe exact manner of varying the controls will depend upon theproportions and conditions of the various ingredients being handled.

. `I claim:

pies the hopper 15 and it is desired to place same Within a portablemixer, the mixer is first backed up to the device (as shown in Figure 1of theY drawings) and the spout v51 is moved into the charging inlet byone or all vof several movements. It is first aligned laterally andlongitudinally by moving the hopper 15 on the wheels 12 and 13, first bymeans of the hand wheel 3G and second by manually moving the entirehopper to one side. In some cases it is desirable to provide a slightslope to the track members 10 so that if the truck should back into thespout it will

